I'd create the greatest game of all time, use my powers to locate an awesome girlfriend, immortalize everyone I care about and give them super powers, then turn them into my own order of guardian angels/devils, and then I'd erase everyones memories so they had no idea I was god, then I'd make sure that my friends with powers had conflicting motivations and watch as they attempted to overthrow and destroy each other and see their visions of the world made real... All in good fun, of course, I'd revive them all and say "Just kidding, I'm God and you guys can't die" then they'd become like Highlanders. Of course I'd fix everything they broke and clean up after them.
P.S: I'd also find this god person and kill him, can't have him getting in the way of my fun